if you're in a relationship do you still masterbate?

okay so i've been with my boyfriend for 2 and a half years now and, don't get me wrong, the sex is great! we have sex 3-8 times a week depending on how much we see each other. but i never seem to get off as hard as i do when i do it myself. so occasionally i have to throw up the good old porno and flick the bean myself. i feel bad cause i enjoy saving myself for him and i don't want him to think he's not doing it right but at the same time i don't think i should feel bad because i'm just enjoying myself. so thoughts/opinions?!